Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI core. */ | |
26 | ||
82453021 | 27 | #include <linux/jiffies.h> |
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kmod.h> | |
30 | ||
31 | #include <linux/types.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/kernel.h> | |
1da177e4 LT |
34 | #include <linux/sched.h> |
35 | #include <linux/slab.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/skbuff.h> | |
f48fd9c8 | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | #include <linux/interrupt.h> |
42 | #include <linux/notifier.h> | |
611b30f7 | 43 | #include <linux/rfkill.h> |
6bd32326 | 44 | #include <linux/timer.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
70f23020 | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | #include <asm/unaligned.h> |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
52 | #include <net/bluetooth/hci_core.h> | |
53 | ||
ab81cbf9 JH |
54 | #define AUTO_OFF_TIMEOUT 2000 |
55 | ||
1da177e4 LT |
56 | static void hci_cmd_task(unsigned long arg); |
57 | static void hci_rx_task(unsigned long arg); | |
58 | static void hci_tx_task(unsigned long arg); | |
59 | static void hci_notify(struct hci_dev *hdev, int event); | |
60 | ||
61 | static DEFINE_RWLOCK(hci_task_lock); | |
62 | ||
63 | /* HCI device list */ | |
64 | LIST_HEAD(hci_dev_list); | |
65 | DEFINE_RWLOCK(hci_dev_list_lock); | |
66 | ||
67 | /* HCI callback list */ | |
68 | LIST_HEAD(hci_cb_list); | |
69 | DEFINE_RWLOCK(hci_cb_list_lock); | |
70 | ||
71 | /* HCI protocols */ | |
72 | #define HCI_MAX_PROTO 2 | |
73 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
74 | ||
75 | /* HCI notifiers list */ | |
e041c683 | 76 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
77 | |
78 | /* ---- HCI notifications ---- */ | |
79 | ||
80 | int hci_register_notifier(struct notifier_block *nb) | |
81 | { | |
e041c683 | 82 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
83 | } |
84 | ||
85 | int hci_unregister_notifier(struct notifier_block *nb) | |
86 | { | |
e041c683 | 87 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
88 | } |
89 | ||
6516455d | 90 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 91 | { |
e041c683 | 92 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
93 | } |
94 | ||
95 | /* ---- HCI requests ---- */ | |
96 | ||
23bb5763 | 97 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 98 | { |
23bb5763 JH |
99 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
100 | ||
a5040efa JH |
101 | /* If this is the init phase check if the completed command matches |
102 | * the last init command, and if not just return. | |
103 | */ | |
104 | if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) | |
23bb5763 | 105 | return; |
1da177e4 LT |
106 | |
107 | if (hdev->req_status == HCI_REQ_PEND) { | |
108 | hdev->req_result = result; | |
109 | hdev->req_status = HCI_REQ_DONE; | |
110 | wake_up_interruptible(&hdev->req_wait_q); | |
111 | } | |
112 | } | |
113 | ||
114 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
115 | { | |
116 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
117 | ||
118 | if (hdev->req_status == HCI_REQ_PEND) { | |
119 | hdev->req_result = err; | |
120 | hdev->req_status = HCI_REQ_CANCELED; | |
121 | wake_up_interruptible(&hdev->req_wait_q); | |
122 | } | |
123 | } | |
124 | ||
125 | /* Execute request and wait for completion. */ | |
8e87d142 | 126 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
01df8c31 | 127 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
128 | { |
129 | DECLARE_WAITQUEUE(wait, current); | |
130 | int err = 0; | |
131 | ||
132 | BT_DBG("%s start", hdev->name); | |
133 | ||
134 | hdev->req_status = HCI_REQ_PEND; | |
135 | ||
136 | add_wait_queue(&hdev->req_wait_q, &wait); | |
137 | set_current_state(TASK_INTERRUPTIBLE); | |
138 | ||
139 | req(hdev, opt); | |
140 | schedule_timeout(timeout); | |
141 | ||
142 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
143 | ||
144 | if (signal_pending(current)) | |
145 | return -EINTR; | |
146 | ||
147 | switch (hdev->req_status) { | |
148 | case HCI_REQ_DONE: | |
149 | err = -bt_err(hdev->req_result); | |
150 | break; | |
151 | ||
152 | case HCI_REQ_CANCELED: | |
153 | err = -hdev->req_result; | |
154 | break; | |
155 | ||
156 | default: | |
157 | err = -ETIMEDOUT; | |
158 | break; | |
3ff50b79 | 159 | } |
1da177e4 | 160 | |
a5040efa | 161 | hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
162 | |
163 | BT_DBG("%s end: err %d", hdev->name, err); | |
164 | ||
165 | return err; | |
166 | } | |
167 | ||
168 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
01df8c31 | 169 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
170 | { |
171 | int ret; | |
172 | ||
7c6a329e MH |
173 | if (!test_bit(HCI_UP, &hdev->flags)) |
174 | return -ENETDOWN; | |
175 | ||
1da177e4 LT |
176 | /* Serialize all requests */ |
177 | hci_req_lock(hdev); | |
178 | ret = __hci_request(hdev, req, opt, timeout); | |
179 | hci_req_unlock(hdev); | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
185 | { | |
186 | BT_DBG("%s %ld", hdev->name, opt); | |
187 | ||
188 | /* Reset device */ | |
f630cf0d | 189 | set_bit(HCI_RESET, &hdev->flags); |
a9de9248 | 190 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
191 | } |
192 | ||
193 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
194 | { | |
b0916ea0 | 195 | struct hci_cp_delete_stored_link_key cp; |
1da177e4 | 196 | struct sk_buff *skb; |
1ebb9252 | 197 | __le16 param; |
89f2783d | 198 | __u8 flt_type; |
1da177e4 LT |
199 | |
200 | BT_DBG("%s %ld", hdev->name, opt); | |
201 | ||
202 | /* Driver initialization */ | |
203 | ||
204 | /* Special commands */ | |
205 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 206 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 207 | skb->dev = (void *) hdev; |
c78ae283 | 208 | |
1da177e4 | 209 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 210 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
211 | } |
212 | skb_queue_purge(&hdev->driver_init); | |
213 | ||
214 | /* Mandatory initialization */ | |
215 | ||
216 | /* Reset */ | |
f630cf0d GP |
217 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { |
218 | set_bit(HCI_RESET, &hdev->flags); | |
a9de9248 | 219 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
f630cf0d | 220 | } |
1da177e4 LT |
221 | |
222 | /* Read Local Supported Features */ | |
a9de9248 | 223 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 224 | |
1143e5a6 | 225 | /* Read Local Version */ |
a9de9248 | 226 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 227 | |
1da177e4 | 228 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 229 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
230 | |
231 | #if 0 | |
232 | /* Host buffer size */ | |
233 | { | |
234 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 235 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 236 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
237 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
238 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 239 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
240 | } |
241 | #endif | |
242 | ||
243 | /* Read BD Address */ | |
a9de9248 MH |
244 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
245 | ||
246 | /* Read Class of Device */ | |
247 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
248 | ||
249 | /* Read Local Name */ | |
250 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
251 | |
252 | /* Read Voice Setting */ | |
a9de9248 | 253 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
254 | |
255 | /* Optional initialization */ | |
256 | ||
257 | /* Clear Event Filters */ | |
89f2783d | 258 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 259 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 | 260 | |
1da177e4 | 261 | /* Connection accept timeout ~20 secs */ |
aca3192c | 262 | param = cpu_to_le16(0x7d00); |
a9de9248 | 263 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
b0916ea0 JH |
264 | |
265 | bacpy(&cp.bdaddr, BDADDR_ANY); | |
266 | cp.delete_all = 1; | |
267 | hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); | |
1da177e4 LT |
268 | } |
269 | ||
6ed58ec5 VT |
270 | static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
271 | { | |
272 | BT_DBG("%s", hdev->name); | |
273 | ||
274 | /* Read LE buffer size */ | |
275 | hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); | |
276 | } | |
277 | ||
1da177e4 LT |
278 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
279 | { | |
280 | __u8 scan = opt; | |
281 | ||
282 | BT_DBG("%s %x", hdev->name, scan); | |
283 | ||
284 | /* Inquiry and Page scans */ | |
a9de9248 | 285 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
286 | } |
287 | ||
288 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
289 | { | |
290 | __u8 auth = opt; | |
291 | ||
292 | BT_DBG("%s %x", hdev->name, auth); | |
293 | ||
294 | /* Authentication */ | |
a9de9248 | 295 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
296 | } |
297 | ||
298 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
299 | { | |
300 | __u8 encrypt = opt; | |
301 | ||
302 | BT_DBG("%s %x", hdev->name, encrypt); | |
303 | ||
e4e8e37c | 304 | /* Encryption */ |
a9de9248 | 305 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
306 | } |
307 | ||
e4e8e37c MH |
308 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
309 | { | |
310 | __le16 policy = cpu_to_le16(opt); | |
311 | ||
a418b893 | 312 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
313 | |
314 | /* Default link policy */ | |
315 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
316 | } | |
317 | ||
8e87d142 | 318 | /* Get HCI device by index. |
1da177e4 LT |
319 | * Device is held on return. */ |
320 | struct hci_dev *hci_dev_get(int index) | |
321 | { | |
322 | struct hci_dev *hdev = NULL; | |
323 | struct list_head *p; | |
324 | ||
325 | BT_DBG("%d", index); | |
326 | ||
327 | if (index < 0) | |
328 | return NULL; | |
329 | ||
330 | read_lock(&hci_dev_list_lock); | |
331 | list_for_each(p, &hci_dev_list) { | |
332 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
333 | if (d->id == index) { | |
334 | hdev = hci_dev_hold(d); | |
335 | break; | |
336 | } | |
337 | } | |
338 | read_unlock(&hci_dev_list_lock); | |
339 | return hdev; | |
340 | } | |
1da177e4 LT |
341 | |
342 | /* ---- Inquiry support ---- */ | |
343 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
344 | { | |
345 | struct inquiry_cache *cache = &hdev->inq_cache; | |
346 | struct inquiry_entry *next = cache->list, *e; | |
347 | ||
348 | BT_DBG("cache %p", cache); | |
349 | ||
350 | cache->list = NULL; | |
351 | while ((e = next)) { | |
352 | next = e->next; | |
353 | kfree(e); | |
354 | } | |
355 | } | |
356 | ||
357 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
358 | { | |
359 | struct inquiry_cache *cache = &hdev->inq_cache; | |
360 | struct inquiry_entry *e; | |
361 | ||
362 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
363 | ||
364 | for (e = cache->list; e; e = e->next) | |
365 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
366 | break; | |
367 | return e; | |
368 | } | |
369 | ||
370 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
371 | { | |
372 | struct inquiry_cache *cache = &hdev->inq_cache; | |
70f23020 | 373 | struct inquiry_entry *ie; |
1da177e4 LT |
374 | |
375 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
376 | ||
70f23020 AE |
377 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
378 | if (!ie) { | |
1da177e4 | 379 | /* Entry not in the cache. Add new one. */ |
70f23020 AE |
380 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
381 | if (!ie) | |
1da177e4 | 382 | return; |
70f23020 AE |
383 | |
384 | ie->next = cache->list; | |
385 | cache->list = ie; | |
1da177e4 LT |
386 | } |
387 | ||
70f23020 AE |
388 | memcpy(&ie->data, data, sizeof(*data)); |
389 | ie->timestamp = jiffies; | |
1da177e4 LT |
390 | cache->timestamp = jiffies; |
391 | } | |
392 | ||
393 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
394 | { | |
395 | struct inquiry_cache *cache = &hdev->inq_cache; | |
396 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
397 | struct inquiry_entry *e; | |
398 | int copied = 0; | |
399 | ||
400 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
401 | struct inquiry_data *data = &e->data; | |
402 | bacpy(&info->bdaddr, &data->bdaddr); | |
403 | info->pscan_rep_mode = data->pscan_rep_mode; | |
404 | info->pscan_period_mode = data->pscan_period_mode; | |
405 | info->pscan_mode = data->pscan_mode; | |
406 | memcpy(info->dev_class, data->dev_class, 3); | |
407 | info->clock_offset = data->clock_offset; | |
408 | info++; | |
409 | } | |
410 | ||
411 | BT_DBG("cache %p, copied %d", cache, copied); | |
412 | return copied; | |
413 | } | |
414 | ||
415 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
416 | { | |
417 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
418 | struct hci_cp_inquiry cp; | |
419 | ||
420 | BT_DBG("%s", hdev->name); | |
421 | ||
422 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
423 | return; | |
424 | ||
425 | /* Start Inquiry */ | |
426 | memcpy(&cp.lap, &ir->lap, 3); | |
427 | cp.length = ir->length; | |
428 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 429 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
430 | } |
431 | ||
432 | int hci_inquiry(void __user *arg) | |
433 | { | |
434 | __u8 __user *ptr = arg; | |
435 | struct hci_inquiry_req ir; | |
436 | struct hci_dev *hdev; | |
437 | int err = 0, do_inquiry = 0, max_rsp; | |
438 | long timeo; | |
439 | __u8 *buf; | |
440 | ||
441 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
442 | return -EFAULT; | |
443 | ||
5a08ecce AE |
444 | hdev = hci_dev_get(ir.dev_id); |
445 | if (!hdev) | |
1da177e4 LT |
446 | return -ENODEV; |
447 | ||
448 | hci_dev_lock_bh(hdev); | |
8e87d142 | 449 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
450 | inquiry_cache_empty(hdev) || |
451 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
452 | inquiry_cache_flush(hdev); |
453 | do_inquiry = 1; | |
454 | } | |
455 | hci_dev_unlock_bh(hdev); | |
456 | ||
04837f64 | 457 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
458 | |
459 | if (do_inquiry) { | |
460 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
461 | if (err < 0) | |
462 | goto done; | |
463 | } | |
1da177e4 LT |
464 | |
465 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
466 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
467 | ||
468 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
469 | * copy it to the user space. | |
470 | */ | |
01df8c31 | 471 | buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
70f23020 | 472 | if (!buf) { |
1da177e4 LT |
473 | err = -ENOMEM; |
474 | goto done; | |
475 | } | |
476 | ||
477 | hci_dev_lock_bh(hdev); | |
478 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
479 | hci_dev_unlock_bh(hdev); | |
480 | ||
481 | BT_DBG("num_rsp %d", ir.num_rsp); | |
482 | ||
483 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
484 | ptr += sizeof(ir); | |
485 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
486 | ir.num_rsp)) | |
487 | err = -EFAULT; | |
8e87d142 | 488 | } else |
1da177e4 LT |
489 | err = -EFAULT; |
490 | ||
491 | kfree(buf); | |
492 | ||
493 | done: | |
494 | hci_dev_put(hdev); | |
495 | return err; | |
496 | } | |
497 | ||
498 | /* ---- HCI ioctl helpers ---- */ | |
499 | ||
500 | int hci_dev_open(__u16 dev) | |
501 | { | |
502 | struct hci_dev *hdev; | |
503 | int ret = 0; | |
504 | ||
5a08ecce AE |
505 | hdev = hci_dev_get(dev); |
506 | if (!hdev) | |
1da177e4 LT |
507 | return -ENODEV; |
508 | ||
509 | BT_DBG("%s %p", hdev->name, hdev); | |
510 | ||
511 | hci_req_lock(hdev); | |
512 | ||
611b30f7 MH |
513 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
514 | ret = -ERFKILL; | |
515 | goto done; | |
516 | } | |
517 | ||
1da177e4 LT |
518 | if (test_bit(HCI_UP, &hdev->flags)) { |
519 | ret = -EALREADY; | |
520 | goto done; | |
521 | } | |
522 | ||
523 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
524 | set_bit(HCI_RAW, &hdev->flags); | |
525 | ||
943da25d MH |
526 | /* Treat all non BR/EDR controllers as raw devices for now */ |
527 | if (hdev->dev_type != HCI_BREDR) | |
528 | set_bit(HCI_RAW, &hdev->flags); | |
529 | ||
1da177e4 LT |
530 | if (hdev->open(hdev)) { |
531 | ret = -EIO; | |
532 | goto done; | |
533 | } | |
534 | ||
535 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
536 | atomic_set(&hdev->cmd_cnt, 1); | |
537 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 538 | hdev->init_last_cmd = 0; |
1da177e4 | 539 | |
04837f64 MH |
540 | ret = __hci_request(hdev, hci_init_req, 0, |
541 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 542 | |
6ed58ec5 VT |
543 | if (lmp_le_capable(hdev)) |
544 | ret = __hci_request(hdev, hci_le_init_req, 0, | |
545 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
546 | ||
1da177e4 LT |
547 | clear_bit(HCI_INIT, &hdev->flags); |
548 | } | |
549 | ||
550 | if (!ret) { | |
551 | hci_dev_hold(hdev); | |
552 | set_bit(HCI_UP, &hdev->flags); | |
553 | hci_notify(hdev, HCI_DEV_UP); | |
5add6af8 JH |
554 | if (!test_bit(HCI_SETUP, &hdev->flags)) |
555 | mgmt_powered(hdev->id, 1); | |
8e87d142 | 556 | } else { |
1da177e4 LT |
557 | /* Init failed, cleanup */ |
558 | tasklet_kill(&hdev->rx_task); | |
559 | tasklet_kill(&hdev->tx_task); | |
560 | tasklet_kill(&hdev->cmd_task); | |
561 | ||
562 | skb_queue_purge(&hdev->cmd_q); | |
563 | skb_queue_purge(&hdev->rx_q); | |
564 | ||
565 | if (hdev->flush) | |
566 | hdev->flush(hdev); | |
567 | ||
568 | if (hdev->sent_cmd) { | |
569 | kfree_skb(hdev->sent_cmd); | |
570 | hdev->sent_cmd = NULL; | |
571 | } | |
572 | ||
573 | hdev->close(hdev); | |
574 | hdev->flags = 0; | |
575 | } | |
576 | ||
577 | done: | |
578 | hci_req_unlock(hdev); | |
579 | hci_dev_put(hdev); | |
580 | return ret; | |
581 | } | |
582 | ||
583 | static int hci_dev_do_close(struct hci_dev *hdev) | |
584 | { | |
585 | BT_DBG("%s %p", hdev->name, hdev); | |
586 | ||
587 | hci_req_cancel(hdev, ENODEV); | |
588 | hci_req_lock(hdev); | |
589 | ||
b77dcf84 TG |
590 | /* Stop timer, it might be running */ |
591 | del_timer_sync(&hdev->cmd_timer); | |
592 | ||
1da177e4 LT |
593 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { |
594 | hci_req_unlock(hdev); | |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* Kill RX and TX tasks */ | |
599 | tasklet_kill(&hdev->rx_task); | |
600 | tasklet_kill(&hdev->tx_task); | |
601 | ||
602 | hci_dev_lock_bh(hdev); | |
603 | inquiry_cache_flush(hdev); | |
604 | hci_conn_hash_flush(hdev); | |
605 | hci_dev_unlock_bh(hdev); | |
606 | ||
607 | hci_notify(hdev, HCI_DEV_DOWN); | |
608 | ||
609 | if (hdev->flush) | |
610 | hdev->flush(hdev); | |
611 | ||
612 | /* Reset device */ | |
613 | skb_queue_purge(&hdev->cmd_q); | |
614 | atomic_set(&hdev->cmd_cnt, 1); | |
615 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
616 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
617 | __hci_request(hdev, hci_reset_req, 0, |
618 | msecs_to_jiffies(250)); | |
1da177e4 LT |
619 | clear_bit(HCI_INIT, &hdev->flags); |
620 | } | |
621 | ||
622 | /* Kill cmd task */ | |
623 | tasklet_kill(&hdev->cmd_task); | |
624 | ||
625 | /* Drop queues */ | |
626 | skb_queue_purge(&hdev->rx_q); | |
627 | skb_queue_purge(&hdev->cmd_q); | |
628 | skb_queue_purge(&hdev->raw_q); | |
629 | ||
630 | /* Drop last sent command */ | |
631 | if (hdev->sent_cmd) { | |
632 | kfree_skb(hdev->sent_cmd); | |
633 | hdev->sent_cmd = NULL; | |
634 | } | |
635 | ||
636 | /* After this point our queues are empty | |
637 | * and no tasks are scheduled. */ | |
638 | hdev->close(hdev); | |
639 | ||
5add6af8 JH |
640 | mgmt_powered(hdev->id, 0); |
641 | ||
1da177e4 LT |
642 | /* Clear flags */ |
643 | hdev->flags = 0; | |
644 | ||
645 | hci_req_unlock(hdev); | |
646 | ||
647 | hci_dev_put(hdev); | |
648 | return 0; | |
649 | } | |
650 | ||
651 | int hci_dev_close(__u16 dev) | |
652 | { | |
653 | struct hci_dev *hdev; | |
654 | int err; | |
655 | ||
70f23020 AE |
656 | hdev = hci_dev_get(dev); |
657 | if (!hdev) | |
1da177e4 LT |
658 | return -ENODEV; |
659 | err = hci_dev_do_close(hdev); | |
660 | hci_dev_put(hdev); | |
661 | return err; | |
662 | } | |
663 | ||
664 | int hci_dev_reset(__u16 dev) | |
665 | { | |
666 | struct hci_dev *hdev; | |
667 | int ret = 0; | |
668 | ||
70f23020 AE |
669 | hdev = hci_dev_get(dev); |
670 | if (!hdev) | |
1da177e4 LT |
671 | return -ENODEV; |
672 | ||
673 | hci_req_lock(hdev); | |
674 | tasklet_disable(&hdev->tx_task); | |
675 | ||
676 | if (!test_bit(HCI_UP, &hdev->flags)) | |
677 | goto done; | |
678 | ||
679 | /* Drop queues */ | |
680 | skb_queue_purge(&hdev->rx_q); | |
681 | skb_queue_purge(&hdev->cmd_q); | |
682 | ||
683 | hci_dev_lock_bh(hdev); | |
684 | inquiry_cache_flush(hdev); | |
685 | hci_conn_hash_flush(hdev); | |
686 | hci_dev_unlock_bh(hdev); | |
687 | ||
688 | if (hdev->flush) | |
689 | hdev->flush(hdev); | |
690 | ||
8e87d142 | 691 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 692 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
693 | |
694 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
695 | ret = __hci_request(hdev, hci_reset_req, 0, |
696 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
697 | |
698 | done: | |
699 | tasklet_enable(&hdev->tx_task); | |
700 | hci_req_unlock(hdev); | |
701 | hci_dev_put(hdev); | |
702 | return ret; | |
703 | } | |
704 | ||
705 | int hci_dev_reset_stat(__u16 dev) | |
706 | { | |
707 | struct hci_dev *hdev; | |
708 | int ret = 0; | |
709 | ||
70f23020 AE |
710 | hdev = hci_dev_get(dev); |
711 | if (!hdev) | |
1da177e4 LT |
712 | return -ENODEV; |
713 | ||
714 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
715 | ||
716 | hci_dev_put(hdev); | |
717 | ||
718 | return ret; | |
719 | } | |
720 | ||
721 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
722 | { | |
723 | struct hci_dev *hdev; | |
724 | struct hci_dev_req dr; | |
725 | int err = 0; | |
726 | ||
727 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
728 | return -EFAULT; | |
729 | ||
70f23020 AE |
730 | hdev = hci_dev_get(dr.dev_id); |
731 | if (!hdev) | |
1da177e4 LT |
732 | return -ENODEV; |
733 | ||
734 | switch (cmd) { | |
735 | case HCISETAUTH: | |
04837f64 MH |
736 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
737 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
738 | break; |
739 | ||
740 | case HCISETENCRYPT: | |
741 | if (!lmp_encrypt_capable(hdev)) { | |
742 | err = -EOPNOTSUPP; | |
743 | break; | |
744 | } | |
745 | ||
746 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
747 | /* Auth must be enabled first */ | |
04837f64 MH |
748 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
749 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
750 | if (err) |
751 | break; | |
752 | } | |
753 | ||
04837f64 MH |
754 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
755 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
756 | break; |
757 | ||
758 | case HCISETSCAN: | |
04837f64 MH |
759 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
760 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
761 | break; |
762 | ||
1da177e4 | 763 | case HCISETLINKPOL: |
e4e8e37c MH |
764 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
765 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
766 | break; |
767 | ||
768 | case HCISETLINKMODE: | |
e4e8e37c MH |
769 | hdev->link_mode = ((__u16) dr.dev_opt) & |
770 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
771 | break; | |
772 | ||
773 | case HCISETPTYPE: | |
774 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
775 | break; |
776 | ||
777 | case HCISETACLMTU: | |
e4e8e37c MH |
778 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
779 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
780 | break; |
781 | ||
782 | case HCISETSCOMTU: | |
e4e8e37c MH |
783 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
784 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
785 | break; |
786 | ||
787 | default: | |
788 | err = -EINVAL; | |
789 | break; | |
790 | } | |
e4e8e37c | 791 | |
1da177e4 LT |
792 | hci_dev_put(hdev); |
793 | return err; | |
794 | } | |
795 | ||
796 | int hci_get_dev_list(void __user *arg) | |
797 | { | |
798 | struct hci_dev_list_req *dl; | |
799 | struct hci_dev_req *dr; | |
800 | struct list_head *p; | |
801 | int n = 0, size, err; | |
802 | __u16 dev_num; | |
803 | ||
804 | if (get_user(dev_num, (__u16 __user *) arg)) | |
805 | return -EFAULT; | |
806 | ||
807 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
808 | return -EINVAL; | |
809 | ||
810 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
811 | ||
70f23020 AE |
812 | dl = kzalloc(size, GFP_KERNEL); |
813 | if (!dl) | |
1da177e4 LT |
814 | return -ENOMEM; |
815 | ||
816 | dr = dl->dev_req; | |
817 | ||
818 | read_lock_bh(&hci_dev_list_lock); | |
819 | list_for_each(p, &hci_dev_list) { | |
820 | struct hci_dev *hdev; | |
c542a06c | 821 | |
1da177e4 | 822 | hdev = list_entry(p, struct hci_dev, list); |
c542a06c | 823 | |
ab81cbf9 | 824 | hci_del_off_timer(hdev); |
c542a06c JH |
825 | |
826 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
827 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
828 | ||
1da177e4 LT |
829 | (dr + n)->dev_id = hdev->id; |
830 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 831 | |
1da177e4 LT |
832 | if (++n >= dev_num) |
833 | break; | |
834 | } | |
835 | read_unlock_bh(&hci_dev_list_lock); | |
836 | ||
837 | dl->dev_num = n; | |
838 | size = sizeof(*dl) + n * sizeof(*dr); | |
839 | ||
840 | err = copy_to_user(arg, dl, size); | |
841 | kfree(dl); | |
842 | ||
843 | return err ? -EFAULT : 0; | |
844 | } | |
845 | ||
846 | int hci_get_dev_info(void __user *arg) | |
847 | { | |
848 | struct hci_dev *hdev; | |
849 | struct hci_dev_info di; | |
850 | int err = 0; | |
851 | ||
852 | if (copy_from_user(&di, arg, sizeof(di))) | |
853 | return -EFAULT; | |
854 | ||
70f23020 AE |
855 | hdev = hci_dev_get(di.dev_id); |
856 | if (!hdev) | |
1da177e4 LT |
857 | return -ENODEV; |
858 | ||
ab81cbf9 JH |
859 | hci_del_off_timer(hdev); |
860 | ||
c542a06c JH |
861 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
862 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
863 | ||
1da177e4 LT |
864 | strcpy(di.name, hdev->name); |
865 | di.bdaddr = hdev->bdaddr; | |
943da25d | 866 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
867 | di.flags = hdev->flags; |
868 | di.pkt_type = hdev->pkt_type; | |
869 | di.acl_mtu = hdev->acl_mtu; | |
870 | di.acl_pkts = hdev->acl_pkts; | |
871 | di.sco_mtu = hdev->sco_mtu; | |
872 | di.sco_pkts = hdev->sco_pkts; | |
873 | di.link_policy = hdev->link_policy; | |
874 | di.link_mode = hdev->link_mode; | |
875 | ||
876 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
877 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
878 | ||
879 | if (copy_to_user(arg, &di, sizeof(di))) | |
880 | err = -EFAULT; | |
881 | ||
882 | hci_dev_put(hdev); | |
883 | ||
884 | return err; | |
885 | } | |
886 | ||
887 | /* ---- Interface to HCI drivers ---- */ | |
888 | ||
611b30f7 MH |
889 | static int hci_rfkill_set_block(void *data, bool blocked) |
890 | { | |
891 | struct hci_dev *hdev = data; | |
892 | ||
893 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
894 | ||
895 | if (!blocked) | |
896 | return 0; | |
897 | ||
898 | hci_dev_do_close(hdev); | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | static const struct rfkill_ops hci_rfkill_ops = { | |
904 | .set_block = hci_rfkill_set_block, | |
905 | }; | |
906 | ||
1da177e4 LT |
907 | /* Alloc HCI device */ |
908 | struct hci_dev *hci_alloc_dev(void) | |
909 | { | |
910 | struct hci_dev *hdev; | |
911 | ||
25ea6db0 | 912 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
913 | if (!hdev) |
914 | return NULL; | |
915 | ||
1da177e4 LT |
916 | skb_queue_head_init(&hdev->driver_init); |
917 | ||
918 | return hdev; | |
919 | } | |
920 | EXPORT_SYMBOL(hci_alloc_dev); | |
921 | ||
922 | /* Free HCI device */ | |
923 | void hci_free_dev(struct hci_dev *hdev) | |
924 | { | |
925 | skb_queue_purge(&hdev->driver_init); | |
926 | ||
a91f2e39 MH |
927 | /* will free via device release */ |
928 | put_device(&hdev->dev); | |
1da177e4 LT |
929 | } |
930 | EXPORT_SYMBOL(hci_free_dev); | |
931 | ||
ab81cbf9 JH |
932 | static void hci_power_on(struct work_struct *work) |
933 | { | |
934 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
935 | ||
936 | BT_DBG("%s", hdev->name); | |
937 | ||
938 | if (hci_dev_open(hdev->id) < 0) | |
939 | return; | |
940 | ||
941 | if (test_bit(HCI_AUTO_OFF, &hdev->flags)) | |
942 | mod_timer(&hdev->off_timer, | |
943 | jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT)); | |
944 | ||
945 | if (test_and_clear_bit(HCI_SETUP, &hdev->flags)) | |
946 | mgmt_index_added(hdev->id); | |
947 | } | |
948 | ||
949 | static void hci_power_off(struct work_struct *work) | |
950 | { | |
951 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_off); | |
952 | ||
953 | BT_DBG("%s", hdev->name); | |
954 | ||
955 | hci_dev_close(hdev->id); | |
956 | } | |
957 | ||
958 | static void hci_auto_off(unsigned long data) | |
959 | { | |
960 | struct hci_dev *hdev = (struct hci_dev *) data; | |
961 | ||
962 | BT_DBG("%s", hdev->name); | |
963 | ||
964 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
965 | ||
966 | queue_work(hdev->workqueue, &hdev->power_off); | |
967 | } | |
968 | ||
969 | void hci_del_off_timer(struct hci_dev *hdev) | |
970 | { | |
971 | BT_DBG("%s", hdev->name); | |
972 | ||
973 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
974 | del_timer(&hdev->off_timer); | |
975 | } | |
976 | ||
2aeb9a1a JH |
977 | int hci_uuids_clear(struct hci_dev *hdev) |
978 | { | |
979 | struct list_head *p, *n; | |
980 | ||
981 | list_for_each_safe(p, n, &hdev->uuids) { | |
982 | struct bt_uuid *uuid; | |
983 | ||
984 | uuid = list_entry(p, struct bt_uuid, list); | |
985 | ||
986 | list_del(p); | |
987 | kfree(uuid); | |
988 | } | |
989 | ||
990 | return 0; | |
991 | } | |
992 | ||
55ed8ca1 JH |
993 | int hci_link_keys_clear(struct hci_dev *hdev) |
994 | { | |
995 | struct list_head *p, *n; | |
996 | ||
997 | list_for_each_safe(p, n, &hdev->link_keys) { | |
998 | struct link_key *key; | |
999 | ||
1000 | key = list_entry(p, struct link_key, list); | |
1001 | ||
1002 | list_del(p); | |
1003 | kfree(key); | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1010 | { | |
1011 | struct list_head *p; | |
1012 | ||
1013 | list_for_each(p, &hdev->link_keys) { | |
1014 | struct link_key *k; | |
1015 | ||
1016 | k = list_entry(p, struct link_key, list); | |
1017 | ||
1018 | if (bacmp(bdaddr, &k->bdaddr) == 0) | |
1019 | return k; | |
1020 | } | |
1021 | ||
1022 | return NULL; | |
1023 | } | |
1024 | ||
1025 | int hci_add_link_key(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr, | |
1026 | u8 *val, u8 type, u8 pin_len) | |
1027 | { | |
1028 | struct link_key *key, *old_key; | |
1029 | u8 old_key_type; | |
1030 | ||
1031 | old_key = hci_find_link_key(hdev, bdaddr); | |
1032 | if (old_key) { | |
1033 | old_key_type = old_key->type; | |
1034 | key = old_key; | |
1035 | } else { | |
1036 | old_key_type = 0xff; | |
1037 | key = kzalloc(sizeof(*key), GFP_ATOMIC); | |
1038 | if (!key) | |
1039 | return -ENOMEM; | |
1040 | list_add(&key->list, &hdev->link_keys); | |
1041 | } | |
1042 | ||
1043 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1044 | ||
1045 | bacpy(&key->bdaddr, bdaddr); | |
1046 | memcpy(key->val, val, 16); | |
1047 | key->type = type; | |
1048 | key->pin_len = pin_len; | |
1049 | ||
1050 | if (new_key) | |
1051 | mgmt_new_key(hdev->id, key, old_key_type); | |
1052 | ||
1053 | if (type == 0x06) | |
1054 | key->type = old_key_type; | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1060 | { | |
1061 | struct link_key *key; | |
1062 | ||
1063 | key = hci_find_link_key(hdev, bdaddr); | |
1064 | if (!key) | |
1065 | return -ENOENT; | |
1066 | ||
1067 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1068 | ||
1069 | list_del(&key->list); | |
1070 | kfree(key); | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
6bd32326 VT |
1075 | /* HCI command timer function */ |
1076 | static void hci_cmd_timer(unsigned long arg) | |
1077 | { | |
1078 | struct hci_dev *hdev = (void *) arg; | |
1079 | ||
1080 | BT_ERR("%s command tx timeout", hdev->name); | |
1081 | atomic_set(&hdev->cmd_cnt, 1); | |
f630cf0d | 1082 | clear_bit(HCI_RESET, &hdev->flags); |
6bd32326 VT |
1083 | tasklet_schedule(&hdev->cmd_task); |
1084 | } | |
1085 | ||
1da177e4 LT |
1086 | /* Register HCI device */ |
1087 | int hci_register_dev(struct hci_dev *hdev) | |
1088 | { | |
1089 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 1090 | int i, id = 0; |
1da177e4 | 1091 | |
c13854ce MH |
1092 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1093 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1094 | |
1095 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1096 | return -EINVAL; | |
1097 | ||
1098 | write_lock_bh(&hci_dev_list_lock); | |
1099 | ||
1100 | /* Find first available device id */ | |
1101 | list_for_each(p, &hci_dev_list) { | |
1102 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1103 | break; | |
1104 | head = p; id++; | |
1105 | } | |
8e87d142 | 1106 | |
1da177e4 LT |
1107 | sprintf(hdev->name, "hci%d", id); |
1108 | hdev->id = id; | |
1109 | list_add(&hdev->list, head); | |
1110 | ||
1111 | atomic_set(&hdev->refcnt, 1); | |
1112 | spin_lock_init(&hdev->lock); | |
1113 | ||
1114 | hdev->flags = 0; | |
1115 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1116 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1117 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1118 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1119 | |
04837f64 MH |
1120 | hdev->idle_timeout = 0; |
1121 | hdev->sniff_max_interval = 800; | |
1122 | hdev->sniff_min_interval = 80; | |
1123 | ||
70f23020 | 1124 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1125 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1126 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1127 | ||
1128 | skb_queue_head_init(&hdev->rx_q); | |
1129 | skb_queue_head_init(&hdev->cmd_q); | |
1130 | skb_queue_head_init(&hdev->raw_q); | |
1131 | ||
6bd32326 VT |
1132 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1133 | ||
cd4c5391 | 1134 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1135 | hdev->reassembly[i] = NULL; |
1136 | ||
1da177e4 | 1137 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1138 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1139 | |
1140 | inquiry_cache_init(hdev); | |
1141 | ||
1142 | hci_conn_hash_init(hdev); | |
1143 | ||
ea4bd8ba | 1144 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1145 | |
2aeb9a1a JH |
1146 | INIT_LIST_HEAD(&hdev->uuids); |
1147 | ||
55ed8ca1 JH |
1148 | INIT_LIST_HEAD(&hdev->link_keys); |
1149 | ||
ab81cbf9 JH |
1150 | INIT_WORK(&hdev->power_on, hci_power_on); |
1151 | INIT_WORK(&hdev->power_off, hci_power_off); | |
1152 | setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev); | |
1153 | ||
1da177e4 LT |
1154 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1155 | ||
1156 | atomic_set(&hdev->promisc, 0); | |
1157 | ||
1158 | write_unlock_bh(&hci_dev_list_lock); | |
1159 | ||
f48fd9c8 MH |
1160 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
1161 | if (!hdev->workqueue) | |
1162 | goto nomem; | |
1163 | ||
1da177e4 LT |
1164 | hci_register_sysfs(hdev); |
1165 | ||
611b30f7 MH |
1166 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1167 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1168 | if (hdev->rfkill) { | |
1169 | if (rfkill_register(hdev->rfkill) < 0) { | |
1170 | rfkill_destroy(hdev->rfkill); | |
1171 | hdev->rfkill = NULL; | |
1172 | } | |
1173 | } | |
1174 | ||
ab81cbf9 JH |
1175 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1176 | set_bit(HCI_SETUP, &hdev->flags); | |
1177 | queue_work(hdev->workqueue, &hdev->power_on); | |
1178 | ||
1da177e4 LT |
1179 | hci_notify(hdev, HCI_DEV_REG); |
1180 | ||
1181 | return id; | |
f48fd9c8 MH |
1182 | |
1183 | nomem: | |
1184 | write_lock_bh(&hci_dev_list_lock); | |
1185 | list_del(&hdev->list); | |
1186 | write_unlock_bh(&hci_dev_list_lock); | |
1187 | ||
1188 | return -ENOMEM; | |
1da177e4 LT |
1189 | } |
1190 | EXPORT_SYMBOL(hci_register_dev); | |
1191 | ||
1192 | /* Unregister HCI device */ | |
1193 | int hci_unregister_dev(struct hci_dev *hdev) | |
1194 | { | |
ef222013 MH |
1195 | int i; |
1196 | ||
c13854ce | 1197 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1198 | |
1da177e4 LT |
1199 | write_lock_bh(&hci_dev_list_lock); |
1200 | list_del(&hdev->list); | |
1201 | write_unlock_bh(&hci_dev_list_lock); | |
1202 | ||
1203 | hci_dev_do_close(hdev); | |
1204 | ||
cd4c5391 | 1205 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1206 | kfree_skb(hdev->reassembly[i]); |
1207 | ||
ab81cbf9 JH |
1208 | if (!test_bit(HCI_INIT, &hdev->flags) && |
1209 | !test_bit(HCI_SETUP, &hdev->flags)) | |
1210 | mgmt_index_removed(hdev->id); | |
1211 | ||
1da177e4 LT |
1212 | hci_notify(hdev, HCI_DEV_UNREG); |
1213 | ||
611b30f7 MH |
1214 | if (hdev->rfkill) { |
1215 | rfkill_unregister(hdev->rfkill); | |
1216 | rfkill_destroy(hdev->rfkill); | |
1217 | } | |
1218 | ||
147e2d59 DY |
1219 | hci_unregister_sysfs(hdev); |
1220 | ||
c6f3c5f7 GP |
1221 | hci_del_off_timer(hdev); |
1222 | ||
f48fd9c8 MH |
1223 | destroy_workqueue(hdev->workqueue); |
1224 | ||
e2e0cacb JH |
1225 | hci_dev_lock_bh(hdev); |
1226 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1227 | hci_uuids_clear(hdev); |
55ed8ca1 | 1228 | hci_link_keys_clear(hdev); |
e2e0cacb JH |
1229 | hci_dev_unlock_bh(hdev); |
1230 | ||
1da177e4 | 1231 | __hci_dev_put(hdev); |
ef222013 | 1232 | |
1da177e4 LT |
1233 | return 0; |
1234 | } | |
1235 | EXPORT_SYMBOL(hci_unregister_dev); | |
1236 | ||
1237 | /* Suspend HCI device */ | |
1238 | int hci_suspend_dev(struct hci_dev *hdev) | |
1239 | { | |
1240 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1241 | return 0; | |
1242 | } | |
1243 | EXPORT_SYMBOL(hci_suspend_dev); | |
1244 | ||
1245 | /* Resume HCI device */ | |
1246 | int hci_resume_dev(struct hci_dev *hdev) | |
1247 | { | |
1248 | hci_notify(hdev, HCI_DEV_RESUME); | |
1249 | return 0; | |
1250 | } | |
1251 | EXPORT_SYMBOL(hci_resume_dev); | |
1252 | ||
76bca880 MH |
1253 | /* Receive frame from HCI drivers */ |
1254 | int hci_recv_frame(struct sk_buff *skb) | |
1255 | { | |
1256 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1257 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1258 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1259 | kfree_skb(skb); | |
1260 | return -ENXIO; | |
1261 | } | |
1262 | ||
1263 | /* Incomming skb */ | |
1264 | bt_cb(skb)->incoming = 1; | |
1265 | ||
1266 | /* Time stamp */ | |
1267 | __net_timestamp(skb); | |
1268 | ||
1269 | /* Queue frame for rx task */ | |
1270 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1271 | tasklet_schedule(&hdev->rx_task); |
1272 | ||
76bca880 MH |
1273 | return 0; |
1274 | } | |
1275 | EXPORT_SYMBOL(hci_recv_frame); | |
1276 | ||
33e882a5 SS |
1277 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1278 | int count, __u8 index, gfp_t gfp_mask) | |
1279 | { | |
1280 | int len = 0; | |
1281 | int hlen = 0; | |
1282 | int remain = count; | |
1283 | struct sk_buff *skb; | |
1284 | struct bt_skb_cb *scb; | |
1285 | ||
1286 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1287 | index >= NUM_REASSEMBLY) | |
1288 | return -EILSEQ; | |
1289 | ||
1290 | skb = hdev->reassembly[index]; | |
1291 | ||
1292 | if (!skb) { | |
1293 | switch (type) { | |
1294 | case HCI_ACLDATA_PKT: | |
1295 | len = HCI_MAX_FRAME_SIZE; | |
1296 | hlen = HCI_ACL_HDR_SIZE; | |
1297 | break; | |
1298 | case HCI_EVENT_PKT: | |
1299 | len = HCI_MAX_EVENT_SIZE; | |
1300 | hlen = HCI_EVENT_HDR_SIZE; | |
1301 | break; | |
1302 | case HCI_SCODATA_PKT: | |
1303 | len = HCI_MAX_SCO_SIZE; | |
1304 | hlen = HCI_SCO_HDR_SIZE; | |
1305 | break; | |
1306 | } | |
1307 | ||
1308 | skb = bt_skb_alloc(len, gfp_mask); | |
1309 | if (!skb) | |
1310 | return -ENOMEM; | |
1311 | ||
1312 | scb = (void *) skb->cb; | |
1313 | scb->expect = hlen; | |
1314 | scb->pkt_type = type; | |
1315 | ||
1316 | skb->dev = (void *) hdev; | |
1317 | hdev->reassembly[index] = skb; | |
1318 | } | |
1319 | ||
1320 | while (count) { | |
1321 | scb = (void *) skb->cb; | |
1322 | len = min(scb->expect, (__u16)count); | |
1323 | ||
1324 | memcpy(skb_put(skb, len), data, len); | |
1325 | ||
1326 | count -= len; | |
1327 | data += len; | |
1328 | scb->expect -= len; | |
1329 | remain = count; | |
1330 | ||
1331 | switch (type) { | |
1332 | case HCI_EVENT_PKT: | |
1333 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1334 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1335 | scb->expect = h->plen; | |
1336 | ||
1337 | if (skb_tailroom(skb) < scb->expect) { | |
1338 | kfree_skb(skb); | |
1339 | hdev->reassembly[index] = NULL; | |
1340 | return -ENOMEM; | |
1341 | } | |
1342 | } | |
1343 | break; | |
1344 | ||
1345 | case HCI_ACLDATA_PKT: | |
1346 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1347 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1348 | scb->expect = __le16_to_cpu(h->dlen); | |
1349 | ||
1350 | if (skb_tailroom(skb) < scb->expect) { | |
1351 | kfree_skb(skb); | |
1352 | hdev->reassembly[index] = NULL; | |
1353 | return -ENOMEM; | |
1354 | } | |
1355 | } | |
1356 | break; | |
1357 | ||
1358 | case HCI_SCODATA_PKT: | |
1359 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1360 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1361 | scb->expect = h->dlen; | |
1362 | ||
1363 | if (skb_tailroom(skb) < scb->expect) { | |
1364 | kfree_skb(skb); | |
1365 | hdev->reassembly[index] = NULL; | |
1366 | return -ENOMEM; | |
1367 | } | |
1368 | } | |
1369 | break; | |
1370 | } | |
1371 | ||
1372 | if (scb->expect == 0) { | |
1373 | /* Complete frame */ | |
1374 | ||
1375 | bt_cb(skb)->pkt_type = type; | |
1376 | hci_recv_frame(skb); | |
1377 | ||
1378 | hdev->reassembly[index] = NULL; | |
1379 | return remain; | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | return remain; | |
1384 | } | |
1385 | ||
ef222013 MH |
1386 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1387 | { | |
f39a3c06 SS |
1388 | int rem = 0; |
1389 | ||
ef222013 MH |
1390 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1391 | return -EILSEQ; | |
1392 | ||
da5f6c37 | 1393 | while (count) { |
f39a3c06 SS |
1394 | rem = hci_reassembly(hdev, type, data, count, |
1395 | type - 1, GFP_ATOMIC); | |
1396 | if (rem < 0) | |
1397 | return rem; | |
ef222013 | 1398 | |
f39a3c06 SS |
1399 | data += (count - rem); |
1400 | count = rem; | |
da5f6c37 | 1401 | }; |
ef222013 | 1402 | |
f39a3c06 | 1403 | return rem; |
ef222013 MH |
1404 | } |
1405 | EXPORT_SYMBOL(hci_recv_fragment); | |
1406 | ||
99811510 SS |
1407 | #define STREAM_REASSEMBLY 0 |
1408 | ||
1409 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1410 | { | |
1411 | int type; | |
1412 | int rem = 0; | |
1413 | ||
da5f6c37 | 1414 | while (count) { |
99811510 SS |
1415 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1416 | ||
1417 | if (!skb) { | |
1418 | struct { char type; } *pkt; | |
1419 | ||
1420 | /* Start of the frame */ | |
1421 | pkt = data; | |
1422 | type = pkt->type; | |
1423 | ||
1424 | data++; | |
1425 | count--; | |
1426 | } else | |
1427 | type = bt_cb(skb)->pkt_type; | |
1428 | ||
1429 | rem = hci_reassembly(hdev, type, data, | |
1430 | count, STREAM_REASSEMBLY, GFP_ATOMIC); | |
1431 | if (rem < 0) | |
1432 | return rem; | |
1433 | ||
1434 | data += (count - rem); | |
1435 | count = rem; | |
da5f6c37 | 1436 | }; |
99811510 SS |
1437 | |
1438 | return rem; | |
1439 | } | |
1440 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1441 | ||
1da177e4 LT |
1442 | /* ---- Interface to upper protocols ---- */ |
1443 | ||
1444 | /* Register/Unregister protocols. | |
1445 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1446 | int hci_register_proto(struct hci_proto *hp) | |
1447 | { | |
1448 | int err = 0; | |
1449 | ||
1450 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1451 | ||
1452 | if (hp->id >= HCI_MAX_PROTO) | |
1453 | return -EINVAL; | |
1454 | ||
1455 | write_lock_bh(&hci_task_lock); | |
1456 | ||
1457 | if (!hci_proto[hp->id]) | |
1458 | hci_proto[hp->id] = hp; | |
1459 | else | |
1460 | err = -EEXIST; | |
1461 | ||
1462 | write_unlock_bh(&hci_task_lock); | |
1463 | ||
1464 | return err; | |
1465 | } | |
1466 | EXPORT_SYMBOL(hci_register_proto); | |
1467 | ||
1468 | int hci_unregister_proto(struct hci_proto *hp) | |
1469 | { | |
1470 | int err = 0; | |
1471 | ||
1472 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1473 | ||
1474 | if (hp->id >= HCI_MAX_PROTO) | |
1475 | return -EINVAL; | |
1476 | ||
1477 | write_lock_bh(&hci_task_lock); | |
1478 | ||
1479 | if (hci_proto[hp->id]) | |
1480 | hci_proto[hp->id] = NULL; | |
1481 | else | |
1482 | err = -ENOENT; | |
1483 | ||
1484 | write_unlock_bh(&hci_task_lock); | |
1485 | ||
1486 | return err; | |
1487 | } | |
1488 | EXPORT_SYMBOL(hci_unregister_proto); | |
1489 | ||
1490 | int hci_register_cb(struct hci_cb *cb) | |
1491 | { | |
1492 | BT_DBG("%p name %s", cb, cb->name); | |
1493 | ||
1494 | write_lock_bh(&hci_cb_list_lock); | |
1495 | list_add(&cb->list, &hci_cb_list); | |
1496 | write_unlock_bh(&hci_cb_list_lock); | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | EXPORT_SYMBOL(hci_register_cb); | |
1501 | ||
1502 | int hci_unregister_cb(struct hci_cb *cb) | |
1503 | { | |
1504 | BT_DBG("%p name %s", cb, cb->name); | |
1505 | ||
1506 | write_lock_bh(&hci_cb_list_lock); | |
1507 | list_del(&cb->list); | |
1508 | write_unlock_bh(&hci_cb_list_lock); | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | EXPORT_SYMBOL(hci_unregister_cb); | |
1513 | ||
1514 | static int hci_send_frame(struct sk_buff *skb) | |
1515 | { | |
1516 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1517 | ||
1518 | if (!hdev) { | |
1519 | kfree_skb(skb); | |
1520 | return -ENODEV; | |
1521 | } | |
1522 | ||
0d48d939 | 1523 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1524 | |
1525 | if (atomic_read(&hdev->promisc)) { | |
1526 | /* Time stamp */ | |
a61bbcf2 | 1527 | __net_timestamp(skb); |
1da177e4 | 1528 | |
eec8d2bc | 1529 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1533 | skb_orphan(skb); | |
1534 | ||
1535 | return hdev->send(skb); | |
1536 | } | |
1537 | ||
1538 | /* Send HCI command */ | |
a9de9248 | 1539 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1540 | { |
1541 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1542 | struct hci_command_hdr *hdr; | |
1543 | struct sk_buff *skb; | |
1544 | ||
a9de9248 | 1545 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1546 | |
1547 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1548 | if (!skb) { | |
ef222013 | 1549 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1550 | return -ENOMEM; |
1551 | } | |
1552 | ||
1553 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1554 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1555 | hdr->plen = plen; |
1556 | ||
1557 | if (plen) | |
1558 | memcpy(skb_put(skb, plen), param, plen); | |
1559 | ||
1560 | BT_DBG("skb len %d", skb->len); | |
1561 | ||
0d48d939 | 1562 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1563 | skb->dev = (void *) hdev; |
c78ae283 | 1564 | |
a5040efa JH |
1565 | if (test_bit(HCI_INIT, &hdev->flags)) |
1566 | hdev->init_last_cmd = opcode; | |
1567 | ||
1da177e4 | 1568 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1569 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1570 | |
1571 | return 0; | |
1572 | } | |
1da177e4 LT |
1573 | |
1574 | /* Get data from the previously sent command */ | |
a9de9248 | 1575 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1576 | { |
1577 | struct hci_command_hdr *hdr; | |
1578 | ||
1579 | if (!hdev->sent_cmd) | |
1580 | return NULL; | |
1581 | ||
1582 | hdr = (void *) hdev->sent_cmd->data; | |
1583 | ||
a9de9248 | 1584 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1585 | return NULL; |
1586 | ||
a9de9248 | 1587 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1588 | |
1589 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1590 | } | |
1591 | ||
1592 | /* Send ACL data */ | |
1593 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1594 | { | |
1595 | struct hci_acl_hdr *hdr; | |
1596 | int len = skb->len; | |
1597 | ||
badff6d0 ACM |
1598 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1599 | skb_reset_transport_header(skb); | |
9c70220b | 1600 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1601 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1602 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1603 | } |
1604 | ||
9a9c6a34 | 1605 | void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
1da177e4 LT |
1606 | { |
1607 | struct hci_dev *hdev = conn->hdev; | |
1608 | struct sk_buff *list; | |
1609 | ||
1610 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1611 | ||
1612 | skb->dev = (void *) hdev; | |
0d48d939 | 1613 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1614 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 | 1615 | |
70f23020 AE |
1616 | list = skb_shinfo(skb)->frag_list; |
1617 | if (!list) { | |
1da177e4 LT |
1618 | /* Non fragmented */ |
1619 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1620 | ||
1621 | skb_queue_tail(&conn->data_q, skb); | |
1622 | } else { | |
1623 | /* Fragmented */ | |
1624 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1625 | ||
1626 | skb_shinfo(skb)->frag_list = NULL; | |
1627 | ||
1628 | /* Queue all fragments atomically */ | |
1629 | spin_lock_bh(&conn->data_q.lock); | |
1630 | ||
1631 | __skb_queue_tail(&conn->data_q, skb); | |
e702112f AE |
1632 | |
1633 | flags &= ~ACL_START; | |
1634 | flags |= ACL_CONT; | |
1da177e4 LT |
1635 | do { |
1636 | skb = list; list = list->next; | |
8e87d142 | 1637 | |
1da177e4 | 1638 | skb->dev = (void *) hdev; |
0d48d939 | 1639 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1640 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
1641 | |
1642 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1643 | ||
1644 | __skb_queue_tail(&conn->data_q, skb); | |
1645 | } while (list); | |
1646 | ||
1647 | spin_unlock_bh(&conn->data_q.lock); | |
1648 | } | |
1649 | ||
c78ae283 | 1650 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1651 | } |
1652 | EXPORT_SYMBOL(hci_send_acl); | |
1653 | ||
1654 | /* Send SCO data */ | |
0d861d8b | 1655 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
1656 | { |
1657 | struct hci_dev *hdev = conn->hdev; | |
1658 | struct hci_sco_hdr hdr; | |
1659 | ||
1660 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1661 | ||
aca3192c | 1662 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1663 | hdr.dlen = skb->len; |
1664 | ||
badff6d0 ACM |
1665 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1666 | skb_reset_transport_header(skb); | |
9c70220b | 1667 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1668 | |
1669 | skb->dev = (void *) hdev; | |
0d48d939 | 1670 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 1671 | |
1da177e4 | 1672 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 1673 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1674 | } |
1675 | EXPORT_SYMBOL(hci_send_sco); | |
1676 | ||
1677 | /* ---- HCI TX task (outgoing data) ---- */ | |
1678 | ||
1679 | /* HCI Connection scheduler */ | |
1680 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1681 | { | |
1682 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1683 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1684 | int num = 0, min = ~0; |
1685 | struct list_head *p; | |
1686 | ||
8e87d142 | 1687 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1688 | * added and removed with TX task disabled. */ |
1689 | list_for_each(p, &h->list) { | |
1690 | struct hci_conn *c; | |
1691 | c = list_entry(p, struct hci_conn, list); | |
1692 | ||
769be974 | 1693 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1694 | continue; |
769be974 MH |
1695 | |
1696 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1697 | continue; | |
1698 | ||
1da177e4 LT |
1699 | num++; |
1700 | ||
1701 | if (c->sent < min) { | |
1702 | min = c->sent; | |
1703 | conn = c; | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | if (conn) { | |
6ed58ec5 VT |
1708 | int cnt, q; |
1709 | ||
1710 | switch (conn->type) { | |
1711 | case ACL_LINK: | |
1712 | cnt = hdev->acl_cnt; | |
1713 | break; | |
1714 | case SCO_LINK: | |
1715 | case ESCO_LINK: | |
1716 | cnt = hdev->sco_cnt; | |
1717 | break; | |
1718 | case LE_LINK: | |
1719 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
1720 | break; | |
1721 | default: | |
1722 | cnt = 0; | |
1723 | BT_ERR("Unknown link type"); | |
1724 | } | |
1725 | ||
1726 | q = cnt / num; | |
1da177e4 LT |
1727 | *quote = q ? q : 1; |
1728 | } else | |
1729 | *quote = 0; | |
1730 | ||
1731 | BT_DBG("conn %p quote %d", conn, *quote); | |
1732 | return conn; | |
1733 | } | |
1734 | ||
bae1f5d9 | 1735 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
1736 | { |
1737 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1738 | struct list_head *p; | |
1739 | struct hci_conn *c; | |
1740 | ||
bae1f5d9 | 1741 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
1742 | |
1743 | /* Kill stalled connections */ | |
1744 | list_for_each(p, &h->list) { | |
1745 | c = list_entry(p, struct hci_conn, list); | |
bae1f5d9 VT |
1746 | if (c->type == type && c->sent) { |
1747 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
1748 | hdev->name, batostr(&c->dst)); |
1749 | hci_acl_disconn(c, 0x13); | |
1750 | } | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1755 | { | |
1756 | struct hci_conn *conn; | |
1757 | struct sk_buff *skb; | |
1758 | int quote; | |
1759 | ||
1760 | BT_DBG("%s", hdev->name); | |
1761 | ||
1762 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1763 | /* ACL tx timeout must be longer than maximum | |
1764 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1765 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 1766 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
1767 | } |
1768 | ||
1769 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1770 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1771 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1772 | |
1773 | hci_conn_enter_active_mode(conn); | |
1774 | ||
1da177e4 LT |
1775 | hci_send_frame(skb); |
1776 | hdev->acl_last_tx = jiffies; | |
1777 | ||
1778 | hdev->acl_cnt--; | |
1779 | conn->sent++; | |
1780 | } | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | /* Schedule SCO */ | |
1785 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1786 | { | |
1787 | struct hci_conn *conn; | |
1788 | struct sk_buff *skb; | |
1789 | int quote; | |
1790 | ||
1791 | BT_DBG("%s", hdev->name); | |
1792 | ||
1793 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1794 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1795 | BT_DBG("skb %p len %d", skb, skb->len); | |
1796 | hci_send_frame(skb); | |
1797 | ||
1798 | conn->sent++; | |
1799 | if (conn->sent == ~0) | |
1800 | conn->sent = 0; | |
1801 | } | |
1802 | } | |
1803 | } | |
1804 | ||
b6a0dc82 MH |
1805 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1806 | { | |
1807 | struct hci_conn *conn; | |
1808 | struct sk_buff *skb; | |
1809 | int quote; | |
1810 | ||
1811 | BT_DBG("%s", hdev->name); | |
1812 | ||
1813 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1814 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1815 | BT_DBG("skb %p len %d", skb, skb->len); | |
1816 | hci_send_frame(skb); | |
1817 | ||
1818 | conn->sent++; | |
1819 | if (conn->sent == ~0) | |
1820 | conn->sent = 0; | |
1821 | } | |
1822 | } | |
1823 | } | |
1824 | ||
6ed58ec5 VT |
1825 | static inline void hci_sched_le(struct hci_dev *hdev) |
1826 | { | |
1827 | struct hci_conn *conn; | |
1828 | struct sk_buff *skb; | |
1829 | int quote, cnt; | |
1830 | ||
1831 | BT_DBG("%s", hdev->name); | |
1832 | ||
1833 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1834 | /* LE tx timeout must be longer than maximum | |
1835 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 1836 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 1837 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 1838 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
1839 | } |
1840 | ||
1841 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
1842 | while (cnt && (conn = hci_low_sent(hdev, LE_LINK, "e))) { | |
1843 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1844 | BT_DBG("skb %p len %d", skb, skb->len); | |
1845 | ||
1846 | hci_send_frame(skb); | |
1847 | hdev->le_last_tx = jiffies; | |
1848 | ||
1849 | cnt--; | |
1850 | conn->sent++; | |
1851 | } | |
1852 | } | |
1853 | if (hdev->le_pkts) | |
1854 | hdev->le_cnt = cnt; | |
1855 | else | |
1856 | hdev->acl_cnt = cnt; | |
1857 | } | |
1858 | ||
1da177e4 LT |
1859 | static void hci_tx_task(unsigned long arg) |
1860 | { | |
1861 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1862 | struct sk_buff *skb; | |
1863 | ||
1864 | read_lock(&hci_task_lock); | |
1865 | ||
6ed58ec5 VT |
1866 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
1867 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
1868 | |
1869 | /* Schedule queues and send stuff to HCI driver */ | |
1870 | ||
1871 | hci_sched_acl(hdev); | |
1872 | ||
1873 | hci_sched_sco(hdev); | |
1874 | ||
b6a0dc82 MH |
1875 | hci_sched_esco(hdev); |
1876 | ||
6ed58ec5 VT |
1877 | hci_sched_le(hdev); |
1878 | ||
1da177e4 LT |
1879 | /* Send next queued raw (unknown type) packet */ |
1880 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1881 | hci_send_frame(skb); | |
1882 | ||
1883 | read_unlock(&hci_task_lock); | |
1884 | } | |
1885 | ||
1886 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1887 | ||
1888 | /* ACL data packet */ | |
1889 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1890 | { | |
1891 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1892 | struct hci_conn *conn; | |
1893 | __u16 handle, flags; | |
1894 | ||
1895 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1896 | ||
1897 | handle = __le16_to_cpu(hdr->handle); | |
1898 | flags = hci_flags(handle); | |
1899 | handle = hci_handle(handle); | |
1900 | ||
1901 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1902 | ||
1903 | hdev->stat.acl_rx++; | |
1904 | ||
1905 | hci_dev_lock(hdev); | |
1906 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1907 | hci_dev_unlock(hdev); | |
8e87d142 | 1908 | |
1da177e4 LT |
1909 | if (conn) { |
1910 | register struct hci_proto *hp; | |
1911 | ||
04837f64 MH |
1912 | hci_conn_enter_active_mode(conn); |
1913 | ||
1da177e4 | 1914 | /* Send to upper protocol */ |
70f23020 AE |
1915 | hp = hci_proto[HCI_PROTO_L2CAP]; |
1916 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
1917 | hp->recv_acldata(conn, skb, flags); |
1918 | return; | |
1919 | } | |
1920 | } else { | |
8e87d142 | 1921 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1922 | hdev->name, handle); |
1923 | } | |
1924 | ||
1925 | kfree_skb(skb); | |
1926 | } | |
1927 | ||
1928 | /* SCO data packet */ | |
1929 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1930 | { | |
1931 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1932 | struct hci_conn *conn; | |
1933 | __u16 handle; | |
1934 | ||
1935 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1936 | ||
1937 | handle = __le16_to_cpu(hdr->handle); | |
1938 | ||
1939 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1940 | ||
1941 | hdev->stat.sco_rx++; | |
1942 | ||
1943 | hci_dev_lock(hdev); | |
1944 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1945 | hci_dev_unlock(hdev); | |
1946 | ||
1947 | if (conn) { | |
1948 | register struct hci_proto *hp; | |
1949 | ||
1950 | /* Send to upper protocol */ | |
70f23020 AE |
1951 | hp = hci_proto[HCI_PROTO_SCO]; |
1952 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
1953 | hp->recv_scodata(conn, skb); |
1954 | return; | |
1955 | } | |
1956 | } else { | |
8e87d142 | 1957 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1958 | hdev->name, handle); |
1959 | } | |
1960 | ||
1961 | kfree_skb(skb); | |
1962 | } | |
1963 | ||
6516455d | 1964 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1965 | { |
1966 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1967 | struct sk_buff *skb; | |
1968 | ||
1969 | BT_DBG("%s", hdev->name); | |
1970 | ||
1971 | read_lock(&hci_task_lock); | |
1972 | ||
1973 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1974 | if (atomic_read(&hdev->promisc)) { | |
1975 | /* Send copy to the sockets */ | |
eec8d2bc | 1976 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1977 | } |
1978 | ||
1979 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1980 | kfree_skb(skb); | |
1981 | continue; | |
1982 | } | |
1983 | ||
1984 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1985 | /* Don't process data packets in this states. */ | |
0d48d939 | 1986 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1987 | case HCI_ACLDATA_PKT: |
1988 | case HCI_SCODATA_PKT: | |
1989 | kfree_skb(skb); | |
1990 | continue; | |
3ff50b79 | 1991 | } |
1da177e4 LT |
1992 | } |
1993 | ||
1994 | /* Process frame */ | |
0d48d939 | 1995 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1996 | case HCI_EVENT_PKT: |
1997 | hci_event_packet(hdev, skb); | |
1998 | break; | |
1999 | ||
2000 | case HCI_ACLDATA_PKT: | |
2001 | BT_DBG("%s ACL data packet", hdev->name); | |
2002 | hci_acldata_packet(hdev, skb); | |
2003 | break; | |
2004 | ||
2005 | case HCI_SCODATA_PKT: | |
2006 | BT_DBG("%s SCO data packet", hdev->name); | |
2007 | hci_scodata_packet(hdev, skb); | |
2008 | break; | |
2009 | ||
2010 | default: | |
2011 | kfree_skb(skb); | |
2012 | break; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | read_unlock(&hci_task_lock); | |
2017 | } | |
2018 | ||
2019 | static void hci_cmd_task(unsigned long arg) | |
2020 | { | |
2021 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2022 | struct sk_buff *skb; | |
2023 | ||
2024 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2025 | ||
1da177e4 | 2026 | /* Send queued commands */ |
5a08ecce AE |
2027 | if (atomic_read(&hdev->cmd_cnt)) { |
2028 | skb = skb_dequeue(&hdev->cmd_q); | |
2029 | if (!skb) | |
2030 | return; | |
2031 | ||
7585b97a | 2032 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2033 | |
70f23020 AE |
2034 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2035 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2036 | atomic_dec(&hdev->cmd_cnt); |
2037 | hci_send_frame(skb); | |
6bd32326 VT |
2038 | mod_timer(&hdev->cmd_timer, |
2039 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); | |
1da177e4 LT |
2040 | } else { |
2041 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2042 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2043 | } |
2044 | } | |
2045 | } |